# Math problem?

Five coins look the same, but one is a counterfeit coin with a different weight than each of
the four genuine coins. Using a balance scale, what is the least number of weighings needed
to ensure that, in every case, the counterfeit coin is found and is shown to be heavier or
lighter?

Related posts:

1. Hard MATH PROBLEM HELP PLEASSE!!!!!!!!!????? THere are twelve coins that are numbered 1 through 12. Eeleven weigh the same and one is either lighter or heavier than the others. Using just three weighings with a...
2. math question? You have 45 silver coins but one of them is a lighter weight counterfeit. How can you determin the counterfeit coin in a maximum of 3 weighings on a balance...
3. I have another math ? you have 12 identical-looking coins, one of which is counterfeit. The counterfeit coin is either heavier or lighter than the rest. the only scale available is a simple balance. using...
4. Can you answer this math question? You have eight coins and a balance scare. The coins look alike, but one is counterfeit and lighter then the other seven. Find the counterfeit coin using two weighings on...
5. math problem, algebra problem? the problem is "You have eight coins and a balance scale. the coins look alike, but one is counterfeit and lighter than the other seven. find the counterfeit coin using...